6)Development of Head and Neck Pharyngeal Arches

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

What is the difference between pharyngeal clefts and pharyngeal pouches?

Pharyngeal clefts and pouches are both internal grooves between two arches
Pharyngeal clefts are external grooves and pharyngeal pouches are internal grooves between two arches (correct)
Pharyngeal clefts are internal grooves and pharyngeal pouches are external grooves between two arches
Pharyngeal clefts and pouches are both external grooves between two arches

Which part of the first pharyngeal arch becomes the future maxilla, zygomatic bone and part of the temporal bone?

Mandibular prominence
Meckel's cartilage
Reichert cartilage
Maxillary prominence (correct)

What does the ventral part of the first arch cartilage form?

The lesser cornu of the hyoid bone
The horseshoe-shaped primordium of the mandible (correct)
The malleus and incus
The styloid process and stylohyoid ligament

What does the dorsal end of the second arch cartilage (Reichert cartilage) contribute to?

The stapes, styloid process and stylohyoid ligament (A) Signup and view all the answers

What structure does Meckel's cartilage give rise to?

The malleus and the sphenomandibular ligament (A) Signup and view all the answers

What happens to the middle section of the first arch cartilage?

It regresses, but its perichondrium forms the anterior ligament of the malleus and sphenomandibular ligament (B) Signup and view all the answers

Which structures arise from the paraxial mesoderm during head and neck development?

Skull base, occipital bone, posterior head muscles, and meninges caudal to the prosencephalon (C) Signup and view all the answers

What is the origin of the laryngeal cartilages and connective tissue within the laryngeal region?

Lateral plate mesoderm (B) Signup and view all the answers

Which of the following structures originate from neural crest cells during head and neck development?

Skeletal structures of the face and pharyngeal arches, teeth, sensory neurons, and gland stroma (A) Signup and view all the answers

What is the source of the ectodermal placodes during head and neck development?

Neuroectoderm (D) Signup and view all the answers

Which structures in the head and neck region arise from the migration of neural crest cells?

Skeletal structures of the face and pharyngeal arches, teeth, and sensory neurons (C) Signup and view all the answers

What is the term used to describe the mesenchymal growths that form the pharyngeal arches?

Pharyngeal arches (A) Signup and view all the answers

Which pharyngeal arch cartilage forms the greater cornu of the hyoid bone?

3rd arch cartilage (D) Signup and view all the answers

From which type of cells do the epiglottic and thyroid cartilages appear to develop?

Neural crest cells (D) Signup and view all the answers

Which muscles do myoblasts from the first pharyngeal arch give rise to?

Muscles of mastication (B) Signup and view all the answers

Which muscles do myoblasts from the second pharyngeal arch give rise to?

Muscles of facial expression (B) Signup and view all the answers

Which muscle does myoblasts of the 3rd pharyngeal arch give rise to?

M.stylopharyngeus (C) Signup and view all the answers

What is the main component that makes up pharyngeal arches?

Ectoderm (D) Signup and view all the answers

Which artery does the 3rd pharyngeal arch give rise to?

Common carotid artery (C) Signup and view all the answers

At the end of the 4th week, how many pairs of pharyngeal arches are formed?

4 pairs (A) Signup and view all the answers

What does pharyngeal pouch and pharyngeal cleft completely regress in humans?

Pharyngeal arch 5 and pouch 5 (D) Signup and view all the answers

Which structure will the ectoderm in the lateral aspect of pharyngeal arches contribute to?

Skin and connective tissue of head and neck (A) Signup and view all the answers

Which artery does aortic arch 6 become?

Pulmonary arteries (C) Signup and view all the answers

What structures are derived from the first arch?

Stapes and long limb of incus (C) Signup and view all the answers

Which cranial nerve is associated with the second arch?

Facial nerve (CN VII) (A) Signup and view all the answers

What does the third pharyngeal pouch give rise to?

Inferior parathyroid gland (C) Signup and view all the answers

Which artery is derived from the fourth arch?

Aortic arch (C) Signup and view all the answers

What muscles are associated with the sixth arch?

Intrinsic muscles of larynx (A) Signup and view all the answers

Which bone is part of the skeletal structures derived from the first arch?

Mandibule (C) Signup and view all the answers

What nerve is associated with the third arch?

Glossopharyngeal nerve (CN IX) (B) Signup and view all the answers

Flashcards

Pharyngeal clefts vs. Pouches

External grooves are pharyngeal clefts; internal grooves between arches are pharyngeal pouches.

Fate of Maxillary Prominence

The maxillary prominence becomes the maxilla, zygomatic bone, and part of the temporal bone.

First Arch Ventral Part

The ventral part of the first arch cartilage forms the horseshoe-shaped primordium of the mandible.

Second Arch Dorsal End role

The dorsal end of the second arch cartilage contributes to the stapes, styloid process, and stylohyoid ligament.